Herbs perennial. Stems branched, diffuse, 10-20 cm, base woody, white minutely hispid. Leaves sessile; leaf blade cuneate-rhombic, ca. 10 × 5-9 mm, firmly leathery, glabrous, base cuneate, apex 3-5-incised-toothed; teeth short awned, whitish green. Verticillasters 2-4-flowered; bracteoles spinescent, ca. 8 mm, glabrous. Calyx tubular-campanulate, ca. 12 × 6 mm, whitish green, firmly leathery, glabrous; teeth ca. 5 mm, oblong-lanceolate, apex short spinescent, posterior tooth ca. 7 mm. Corolla yellowish with distinct purple-brown veins, 2.5-2.7 cm; upper lip ca. 1.8 × 0.6 cm, white lanate outside, white strigose inside; lower lip ca. 1.5 × 1 cm, 3-partite, puberulent outside, glabrous inside; middle lobe obcordate, ca. 8 × 10 mm, apex 2-lobulate; lateral lobes ovate, ca. 4.2 × 3.5 mm, apex 2-toothed. Posterior stamens ca. 2 cm, anterior ca. 2.4 cm. Ovary glabrous. Fl. Jul-Sep, fr. Oct.
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